Reference https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB0717055

In ServiceNow,Tagsallow users tocategorize and grouprecords in a list. Tagged records arevisible to othersif set to public or shared with specific users or groups.
A: Tags
Tags help usersorganize and quickly locaterecords.
Tags can beprivate (Me)orshared (Everyone, Groups, or Specific Users).
Example:
A support team might tagcritical incidentswith "Urgent" for easy tracking.
B: History
TheHistorymodule showsrecently accessed recordsbut does not categorize or share records.
C: Favorites
Favoritesallow users tobookmark specific records or listsfor quick access, but they areprivateand not shared with others.
D: Activity Formatter
TheActivity Formattertrackschanges and updatesin a record (e.g., who modified the record, comments added), but it does notcategorize or sharerecords.
References:ServiceNow Documentation:Using Tags in Lists
ServiceNow User Guide:Managing and Sharing Tags

InServiceNow Reporting, when modifying a report, users can preview the resultswithout savingby clicking the"Run"button. This executes the report with the current settings and displays the updated resultsbefore committing any changes.
C: Run
The"Run"button allows users toexecute the report immediatelyto see updated results.
It helps users verify if filters, conditions, or visualizations are correctbefore saving the report.
Example: If a user changes thedate rangeon anincident report, clicking"Run"updates the chartwithout saving the report permanently.
A: Execute
There isno "Execute" buttonin ServiceNow Reporting.
"Execute" is used in scripting (e.g., Business Rules, Scheduled Jobs), not for reports.
B: Try it
Not a valid option in ServiceNow Reporting.
Possibly confused with"Try It" in Flow Designeror Catalog Items.
D: Test
"Test" is used inWorkflows, Business Rules, and Flow Designer, not in reports.
E: Preview
There isno "Preview" buttonfor running reports.
"Preview" is typically used inUI Policies and Forms.
References:ServiceNow Documentation:Creating and Running Reports
ServiceNow Reporting Guide:Modifying Reports in Report Designer